mono/utils/mono-hwcap-ppc.c

   1 /*
   2  * mono-hwcap-ppc.c: PowerPC hardware feature detection
   3  *
   4  * Authors:
   5  *    Alex Rønne Petersen (alexrp@xamarin.com)
   6  *    Elijah Taylor (elijahtaylor@google.com)
   7  *    Miguel de Icaza (miguel@xamarin.com)
   8  *    Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com)
   9  *    Paolo Molaro (lupus@xamarin.com)
  10  *    Rodrigo Kumpera (kumpera@gmail.com)
  11  *    Sebastien Pouliot (sebastien@xamarin.com)
  12  *    Zoltan Varga (vargaz@xamarin.com)
  13  *
  14  * Copyright 2003 Ximian, Inc.
  15  * Copyright 2003-2011 Novell, Inc
  16  * Copyright 2006 Broadcom
  17  * Copyright 2007-2008 Andreas Faerber
  18  * Copyright 2011-2013 Xamarin Inc
  19  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  20  */
  21
  22 #include "mono/utils/mono-hwcap.h"
  23
  24 #if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
  25 #include <string.h>
  26 #include <sys/auxv.h>
  27 #endif
  28
  29 void
  30 mono_hwcap_arch_init (void)
  31 {
  32 #if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
  33         unsigned long hwcap;
  34         unsigned long platform;
  35
  36         if ((hwcap = getauxval(AT_HWCAP))) {
  37                 /* PPC_FEATURE_ICACHE_SNOOP */
  38                 if (hwcap & 0x00002000)
  39                         mono_hwcap_ppc_has_icache_snoop = TRUE;
  40
  41                 /* PPC_FEATURE_POWER4, PPC_FEATURE_POWER5, PPC_FEATURE_POWER5_PLUS,
  42                    PPC_FEATURE_CELL_BE, PPC_FEATURE_PA6T, PPC_FEATURE_ARCH_2_05 */
  43                 if (hwcap & (0x00080000 | 0x00040000 | 0x00020000 | 0x00010000 | 0x00000800 | 0x00001000))
  44                         mono_hwcap_ppc_is_isa_2x = TRUE;
  45
  46                 /* PPC_FEATURE_64 */
  47                 if (hwcap & 0x40000000)
  48                         mono_hwcap_ppc_is_isa_64 = TRUE;
  49
  50                 /* PPC_FEATURE_POWER6_EXT */
  51                 if (hwcap & 0x00000200)
  52                         mono_hwcap_ppc_has_move_fpr_gpr = TRUE;
  53         }
  54
  55         if ((platform = getauxval(AT_PLATFORM))) {
  56                 const char *str = (const char *) platform;
  57
  58                 if (!strcmp (str, "ppc970") || (!strncmp (str, "power", 5) && str [5] >= '4' && str [5] <= '7'))
  59                         mono_hwcap_ppc_has_multiple_ls_units = TRUE;
  60         }
  61 #endif
  62 }